Simplify `(1-sqrt(-1))(1+sqrt(-1))(5-sqrt(-7))(5+sqrt(-7))`

(5-sqrt(-7))(5+sqrt(-7))(2-sqrt(-1))(2+sqrt(-1))

Simplify (sqrt(2)-1+sqrt(6))/sqrt(5)

Simplify: (7+3sqrt(5))/(3+sqrt(5))-(7-3sqrt(5))/(3-sqrt(5)) (ii) (1)/(2+sqrt(3))+(2)/(sqrt(5)-sqrt(3))+(1)/(2-sqrt(5))

simplify (5+sqrt(7))(5+sqrt(2))

Simplify (1)/(sqrt(6)-sqrt(5))+sqrt(6)-sqrt(5)

Simplify (sqrt(7)-sqrt(5))/(sqrt(7)+sqrt(5))+sqrt(35)

(sqrt(5)-1)/(sqrt(5)+1)+(sqrt(5)+1)/(sqrt(5)-1)

(1)/(sqrt(2)+sqrt(5)-sqrt(7))

Simplify (1)/(sqrt(5)+sqrt(6)-sqrt(11))